package upyunfile

import (
	"context"
	"errors"
	"fmt"
	"log/slog"

	"github.com/samber/lo"

	"github.com/certimate-go/certimate/pkg/core/certmgr"
	mcertmgr "github.com/certimate-go/certimate/pkg/core/certmgr/providers/upyun-ssl"
	"github.com/certimate-go/certimate/pkg/core/deployer"
	upyunsdk "github.com/certimate-go/certimate/pkg/sdk3rd/upyun/console"
)

type DeployerConfig struct {
	// 又拍云账号用户名。
	Username string `json:"username"`
	// 又拍云账号密码。
	Password string `json:"password"`
	// 存储桶名。暂时无用。
	Bucket string `json:"bucket"`
	// 自定义域名（支持泛域名）。
	Domain string `json:"domain"`
}

type Deployer struct {
	config     *DeployerConfig
	logger     *slog.Logger
	sdkClient  *upyunsdk.Client
	sdkCertmgr certmgr.Provider
}

var _ deployer.Provider = (*Deployer)(nil)

func NewDeployer(config *DeployerConfig) (*Deployer, error) {
	if config == nil {
		return nil, errors.New("the configuration of the deployer provider is nil")
	}

	client, err := createSDKClient(config.Username, config.Password)
	if err != nil {
		return nil, fmt.Errorf("could not create client: %w", err)
	}

	pcertmgr, err := mcertmgr.NewCertmgr(&mcertmgr.CertmgrConfig{
		Username: config.Username,
		Password: config.Password,
	})
	if err != nil {
		return nil, fmt.Errorf("could not create certmgr: %w", err)
	}

	return &Deployer{
		config:     config,
		logger:     slog.Default(),
		sdkClient:  client,
		sdkCertmgr: pcertmgr,
	}, nil
}

func (d *Deployer) SetLogger(logger *slog.Logger) {
	if logger == nil {
		d.logger = slog.New(slog.DiscardHandler)
	} else {
		d.logger = logger
	}

	d.sdkCertmgr.SetLogger(logger)
}

func (d *Deployer) Deploy(ctx context.Context, certPEM, privkeyPEM string) (*deployer.DeployResult, error) {
	// 上传证书
	upres, err := d.sdkCertmgr.Upload(ctx, certPEM, privkeyPEM)
	if err != nil {
		return nil, fmt.Errorf("failed to upload certificate file: %w", err)
	} else {
		d.logger.Info("ssl certificate uploaded", slog.Any("result", upres))
	}

	// 获取域名证书配置
	getHttpsServiceManagerResp, err := d.sdkClient.GetHttpsServiceManager(d.config.Domain)
	d.logger.Debug("sdk request 'console.GetHttpsServiceManager'", slog.String("request.domain", d.config.Domain), slog.Any("response", getHttpsServiceManagerResp))
	if err != nil {
		return nil, fmt.Errorf("failed to execute sdk request 'console.GetHttpsServiceManager': %w", err)
	}

	// 判断域名是否已启用 HTTPS
	// 如果已启用，迁移域名证书；否则，设置新证书
	_, lastCertIndex, _ := lo.FindIndexOf(getHttpsServiceManagerResp.Data.Domains, func(item upyunsdk.HttpsServiceManagerDomain) bool {
		return item.Https
	})
	if lastCertIndex == -1 {
		updateHttpsCertificateManagerReq := &upyunsdk.UpdateHttpsCertificateManagerRequest{
			CertificateId: upres.CertId,
			Domain:        d.config.Domain,
			Https:         true,
			ForceHttps:    true,
		}
		updateHttpsCertificateManagerResp, err := d.sdkClient.UpdateHttpsCertificateManager(updateHttpsCertificateManagerReq)
		d.logger.Debug("sdk request 'console.EnableDomainHttps'", slog.Any("request", updateHttpsCertificateManagerReq), slog.Any("response", updateHttpsCertificateManagerResp))
		if err != nil {
			return nil, fmt.Errorf("failed to execute sdk request 'console.UpdateHttpsCertificateManager': %w", err)
		}
	} else if getHttpsServiceManagerResp.Data.Domains[lastCertIndex].CertificateId != upres.CertId {
		migrateHttpsDomainReq := &upyunsdk.MigrateHttpsDomainRequest{
			CertificateId: upres.CertId,
			Domain:        d.config.Domain,
		}
		migrateHttpsDomainResp, err := d.sdkClient.MigrateHttpsDomain(migrateHttpsDomainReq)
		d.logger.Debug("sdk request 'console.MigrateHttpsDomain'", slog.Any("request", migrateHttpsDomainReq), slog.Any("response", migrateHttpsDomainResp))
		if err != nil {
			return nil, fmt.Errorf("failed to execute sdk request 'console.MigrateHttpsDomain': %w", err)
		}
	}

	return &deployer.DeployResult{}, nil
}

func createSDKClient(username, password string) (*upyunsdk.Client, error) {
	return upyunsdk.NewClient(username, password)
}
